Irishman Pierce O'Leary gave us a glimpse of his potential with a brutal finish off Robin Zamora, as he sent his gum-shield into the stands. Hit 'Subscribe' above to ensure you never miss a video from the BT Sport YouTube channel. Get a BT Sport Monthly Pass now! - http://bit.ly/BTSportMonthlyPass Visit and subscribe to our 'BT Sport Boxing' YouTube channel ➡️ http://www.youtube.com/c/btsportboxing Twitter: http://twitter.com/btsport Facebook: http://www.facebook.com/btsport Instagram: http://instagram.com/btsport Tik Tok: http://www.tiktok.com/@btsport Website: http://sport.bt.com